Letone（Letone） Throttle and kill hose It is used for flexible connection between inner and outer nozzles, and flexible connection between mud gas separator and throttling manifold. It not only has high pressure resistance, heat insulation, flame retardance, fire resistance, etc., but also has an inner wall that is more wear resistant than steel pipe. High wear resistance. Pressurizing hose can also be called metal hose, armored hose.